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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_ASH_ROOT_WINDOW_TRANSFORMER_H_
#define ASH_ASH_ROOT_WINDOW_TRANSFORMER_H_
#include "ash/ash_export.h"
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "ui/aura/root_window_transformer.h"
#include "ui/gfx/insets.h"
#include "ui/gfx/transform.h"
namespace aura {
class RootWindow;
}
namespace gfx {
class Display;
}
namespace ash {
// RootWindowTransformer for ash environment.
class ASH_EXPORT AshRootWindowTransformer : public aura::RootWindowTransformer {
public:
AshRootWindowTransformer(aura::RootWindow* root,
const gfx::Display& display);
// aura::RootWindowTransformer overrides:
virtual gfx::Transform GetTransform() const OVERRIDE;
virtual gfx::Transform GetInverseTransform() const OVERRIDE;
virtual gfx::Rect GetRootWindowBounds(
const gfx::Size& host_size) const OVERRIDE;
virtual gfx::Insets GetHostInsets() const OVERRIDE;
private:
virtual ~AshRootWindowTransformer();
aura::RootWindow* root_window_;
gfx::Transform transform_;
// The accurate representation of the inverse of the |transform_|.
// This is used to avoid computation error caused by
// |gfx::Transform::GetInverse|.
gfx::Transform invert_transform_;
// The transform of the root window bounds. This is used to calculate
// the size of root window.
gfx::Transform root_window_bounds_transform_;
// The scale of the root window. This is used to expand the
// area of the root window (useful in HighDPI display).
// Note that this should not be confused with the device scale
// factor, which specfies the pixel density of the display.
float root_window_ui_scale_;
gfx::Insets host_insets_;
DISALLOW_COPY_AND_ASSIGN(AshRootWindowTransformer);
};
} // namespace ash
#endif // ASH_ASH_ROOT_WINDOW_TRANSFORMER_H_
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